Nginx error solution Summary

Nginx error optimization document

1. A large number of time_wait Cases

View:

Netstat-N | awk '/^ TCP/{++ s [$ NF]} end {for (a in S) printa. s [a]}'

 

Closed: No connection is active or in progress

Listen: the server is waiting for incoming call

Syn_recv: a connection request has arrived, waiting for confirmation

Syn_sent: The application has started. Open a connection.

Established: normal data transmission status

Fin_wait1: The application says it has been completed

Fin_wait2: the other side has agreed to release

Itmed_wait: wait until all groups die

Closing: both sides attempt to close at the same time

Time_wait: the other side has initialized a release.

Last_ack: waiting for all groups to die

Modify:

VI/etc/sysctl. conf

Net. ipv4.tcp _ syscookies = 1

Net. ipv4.tcp _ tw_reuse = 1

Net. ipv4.tcp _ tw_recycle = 1

Net. ipv4.tcp _ tw_fin_timeout = 30

/Sbin/sysctl-P

Net. ipv4.tcp _ syncookies = 1 indicates enabling syn cookies. When a SYN wait queue overflows, cookies are enabled to prevent a small number of SYN attacks. The default value is 0, indicating that the process is disabled;

Net. ipv4.tcp _ tw_reuse = 1 indicates enabling reuse. Allow time-Wait sockets to be re-used for a New TCP connection. The default value is 0, indicating that the TCP connection is disabled;

Net. ipv4.tcp _ tw_recycle = 1 indicates to enable quick recovery of Time-Wait sockets in TCP connections. The default value is 0, indicating to disable it.

Net. ipv4.tcp _ fin_timeout modifies the default timeout time of the system.

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2. A large number of too upload open files appear in error. log.

Add the following PID in nginx. conf:

Worker_rlimit_nofile 655350;

VI/etc/security/limits. conf

* Soft nofile 655350

* Hard nofile 655350

To make limits. conf effective, you must ensure that the pam_limits.so file is added to the Startup File.

VI/etc/PAM. d/login

Add:

Session required/lib/security/pam_limits.so

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Error_log:

14:02:42 [Error] 7357 #0: * 19 FastCGI sent in stderr: "primary script unknown" while reading response header from upstream, client: 192.168.2.15, server: localhost, request: "Get/index. php http/1.1 ", upstream:" FastCGI: // 192.168.2.22: 9000 ", host:" 192.168.2.22

 

Modify:

VI nginx. conf

Fastcgi_param script_name $ document $ fastcgi_script_name;

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Error. log:

16:14:31 [Error] 17029 #0: * 17941 Recv () failed (104: Connection reset by peer) while reading response header from upstream, client: 210.61.12.2, server: blog.lixiphp.com, request: "post/API/1.0 HTTP/1.1", upstream: "FastCGI: // 127.0.0.1: 9000", host: "blog.lixiphp.com"

Where: (104: Connection reset by peer)

VI php-fpm.conf

Request_terminate_timeout = 0 remove comments and change to 0

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This article is from the "frequently used documentation" blog, please be sure to keep this source http://yujianglei.blog.51cto.com/7215578/1561589

Nginx error solution Summary